# Question #27abc

##### 1 Answer

Feb 24, 2017

The vertex is at

#### Explanation:

There are different methods you can use.

A quadratic has the form

The vertex lies on the line of symmetry of the parabola.

It is a vertical line and can be found from

Once you know the

Now find

The vertex is at

OR:

Completing the square will give the vertex form.

OR:

You can draw the graph by finding points and plotting them and then read the vertex from the points or from the graph.

graph{y=x^2-2x-5 [-9.9, 10.1, -6.56, 3.44]}